Hi all!
For each basic monad there seems to be a corresponding transformer,
e.g. 'StateT' for 'State' and so on.
I guess the reason lies in the fact that if there were an IO
Transformer monad, one might run it and get the 'Universe' out of the
IO monad.
But, I am working on understanding IO magic, on a much more concrete
level, so I am am looking for a really good explanation of the above.
(And the IO monad in general.)
Thanks!
/Henning